package org.imaginedays.androidall.ui;

import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListActivity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;

/**
 * 所有demo的入口
 * 
 * @author imaginedays
 * 
 */
public class AndroidAllACT extends ListActivity {
	
	private final String PATH = "org.imaginedays.android.Path";
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		  Intent intent = getIntent();
	        String path = intent.getStringExtra(PATH);
	        
	        if (path == null) {
	            path = "";
	        }

	        setListAdapter(new SimpleAdapter(this, getData(path),
	                android.R.layout.simple_list_item_1, new String[] { "title" },
	                new int[] { android.R.id.text1 }));
	        getListView().setTextFilterEnabled(true);
		
	}
	
	 protected List<Map<String, Object>> getData(String prefix) {
	        List<Map<String, Object>> myData = new ArrayList<Map<String, Object>>();

	        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
	        mainIntent.addCategory(Intent.CATEGORY_SAMPLE_CODE);

	        PackageManager pm = getPackageManager();
	        List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);

	        if (null == list)
	            return myData;

	        String[] prefixPath;
	        String prefixWithSlash = prefix;
	        
	        if (prefix.equals("")) {
	            prefixPath = null;
	        } else {
	            prefixPath = prefix.split("/");
	            prefixWithSlash = prefix + "/";
	        }
	        
	        int len = list.size();
	        
	        Map<String, Boolean> entries = new HashMap<String, Boolean>();

	        for (int i = 0; i < len; i++) {
	            ResolveInfo info = list.get(i);
	            CharSequence labelSeq = info.loadLabel(pm);
	            String label = labelSeq != null
	                    ? labelSeq.toString()
	                    : info.activityInfo.name;
	            
	            if (prefixWithSlash.length() == 0 || label.startsWith(prefixWithSlash)) {
	                
	                String[] labelPath = label.split("/");

	                String nextLabel = prefixPath == null ? labelPath[0] : labelPath[prefixPath.length];

	                if ((prefixPath != null ? prefixPath.length : 0) == labelPath.length - 1) {
	                    addItem(myData, nextLabel, activityIntent(
	                            info.activityInfo.applicationInfo.packageName,
	                            info.activityInfo.name));
	                } else {
	                    if (entries.get(nextLabel) == null) {
	                        addItem(myData, nextLabel, browseIntent(prefix.equals("") ? nextLabel : prefix + "/" + nextLabel));
	                        entries.put(nextLabel, true);
	                    }
	                }
	            }
	        }

	        Collections.sort(myData, sDisplayNameComparator);
	        
	        return myData;
	    }
	
	  private final static Comparator<Map<String, Object>> sDisplayNameComparator =
		        new Comparator<Map<String, Object>>() {
		        private final Collator   collator = Collator.getInstance();

		        public int compare(Map<String, Object> map1, Map<String, Object> map2) {
		            return collator.compare(map1.get("title"), map2.get("title"));
		        }
		    };

		    protected Intent activityIntent(String pkg, String componentName) {
		        Intent result = new Intent();
		        result.setClassName(pkg, componentName);
		        return result;
		    }
		    
		    protected Intent browseIntent(String path) {
		        Intent result = new Intent();
		        result.setClass(this, AndroidAllACT.class);
		        result.putExtra(PATH, path);
		        return result;
		    }

		    protected void addItem(List<Map<String, Object>> data, String name, Intent intent) {
		        Map<String, Object> temp = new HashMap<String, Object>();
		        temp.put("title", name);
		        temp.put("intent", intent);
		        data.add(temp);
		    }

		    @Override
		    @SuppressWarnings("unchecked")
		    protected void onListItemClick(ListView l, View v, int position, long id) {
		        Map<String, Object> map = (Map<String, Object>)l.getItemAtPosition(position);

		        Intent intent = (Intent) map.get("intent");
		        startActivity(intent);
		    }

}
